as与which引导非限定性定语从句用法

1、as与which引导非限定性定语从句用法首先，as和which都可以表示主句在意义上的连贯，在从句中作主语，或用作及物动词的宾语，如：一、 as, which 指代整个句子或短语。由 as, which 引导的非限定性定语从句，相当于 and this 或 and that 。在很多时候，表示说话人对话语的看法或态度，此时它们的先行词并不是具体的某个词，而是整个句子或短语：He was late for school ， as/which was usual with him 他上学迟到，这是家常便饭。 He married her， whichas was natural I was ver

2、y helpful to him， which/ as he realized二as含有正如、按照、正像之意，as一般用在肯定句中，而which则 多用于含否定意义的句子中，如：As our teacher points out， that book is of benefit to everyone Heat is a form of energy， as is known to all of us This machine， as might be expected， has stopped operating He failed in the exam again， as was exp

3、ectedHe failed in the exam again， which was unexpected（此处不可用 as ）as 所引导的从句所表达的语意须和主句一致，而 which 则无此限制。三as 常与从句中的 know ， see ， hear ， expect 等动词连用，也常用于 as often happens ， as is often the case （常有的事）等句子中。下列固定结构，一般不能用which，如： as has been said before 如前所述 as often happens 正像经常发生的那样 as is well known 众所周知

4、as will be shown in Fig 3 将如图3所示 as we know 正如我们知道的那样 as may be imagined 这可以想象得出来 as we all can see 正如我们大家看到的那样She is the same age as you (are). 她和你年龄一样大。 与 same.as 连用 I hope to get such a dictionary as he is using. 我希望有一本和你正在用的一样的词典。 与 such.as 连用 As water is to fish, so air is to man. 正如水对鱼一样重要，空气对

5、于人同样重要。四当关系代词代表主句引起的结果，又做主谓宾补（svoc）结构中的主语时，多用which，如： He saw the girl， which delighted him He didntt pass the exam， which made his mother angry五在从句中作介词宾语时，用which，如： We didnt go to the film， instead of which we went to the theatre六在从句中作定语时，常用which，如： I told her to see a doctor， which advice she took七

6、在从句中代表主句中的谓语的整个概念时，常用which，如： He can write a letter in English， which I can not八指代主句中一个名词时，多用which，如： I gave him an interesting book， which he started to read at once九代替主句中的形容词时，常用which，如： He thought me impatient， which he himself was 练习（判断正误） 1Her performance was wonderful， which we had expected 2H

7、e told us a joke， which made all of us laugh 3As is well known to us all that the earth is round 4Metal will bear beating with a hammer， as a stone will not 5He was emigrated（移居）in 1948，at which time there was much hardship and unrest 6Mum always treats me just like a baby， as I cant bear 7Lincoln was shot in a theatre， which was described in this book 8His children asked him to go for a row with them in the afternoon， which he promised 9This book， as is imagined， is very good